Mandrel handling machine



May 30, 1933. Y H, R, JUDSON 1,911,899

MANDREL HANDLING MACHINE Filed May 20, 1932 I lweido:

V weer E. Juoso/v,

y 'YE `lz'atentecl May 30, 1933 UNITED STATES BARRY R. J'UDSON, 0F

ADA, OH'JIO, ASSIGNOR T0 NATONAL TUBE OOHPANY, A.l COBPOBATIGN OFNEW' JERSEY nnnnnnr. HANDLING MACHINE Application led May 20,

This invention is a machine for removing and replacing mandrels on the end of 'a mandrel bar between a pair of rolls, and 1s particularly adapted for use with seamless tube mills.

These mandrels are now manually handled and this involves a considerable amount of labor and some little danger, all of which this machine is intended to obviate.

i@ Having reference to the accompanying drawing which illustrates specific examples of this invention, v

Figure -1 is a side elevation of one form. Figure 2 is a top plan of the first figure.

im Figure 3 is a side elevation of another form.

shown hay The preferred form of the machine as the drawing has a guidel alined in front or and below a mandrel har 2 which holds a mandrel 3 between a pair of rolls 4.

g@ rlhis guide carries a sliding cross-head 5 to 3a crank 11 reciprocates the .cross-head. 5 by.

means of a connecting-rod 12.

in operation, the cross-head is reciprooated forward so that the arm 6 reaches upward and engages the mandrel 3. When the crosshead 5 is moved in the opposite direction the curved end ofthe arm 6 rides on the roller 8 and drops downwardly because of its Shep; When in this position the mandrel may removed and another substituted or if the same mandrel is to be used again it may be sprayed with water to cool it.

In .the modified form of the invention a ide 13 is rovided in place of the guide 1.

his guide as an u wardly flared top sur-- face 14, and a crosscad 15 fits in Ait This cross-head 15 ivotall carries an Verin 16 which is.

1y descri 'except that its dropping motion is accomplished by a projection 17 arranged near its pivoted end. k'l'.his projection ho nera y simi ar to the one original- 1932. serial no. 612,567.

the arm 16 so that it can engage the mandrel between therolls when the cross-head is in its forward position. When the cross-head moves in the opposite direction the arm 16 drops because t e projection 17 rides u the curved part of the surface 14. In this orm, the arm 16 drops sufficiently so-that a bosh 18 filled with water can receive and cool the mandrel on the end of the arm. ln this case the cross-head 15 is reciprocated by a duid motor 19 of the cylinder and piston type.

Although a specic form ofthe invention has been shown in accordance with the patent statutes, it is not intended to limit the scope of the invention exactly thereto, exce t as dened in the' accompanying claims.

claim: 1. Armachine for removing and replacin mandrels on the end of a mandrel har loe-y tween a pair of rolls including an arm alined with said bar, means for mounting the end of said arm remote from said har for reciprocatory movement alined therewith, means for guiding the free end of said arm upwardly when approaching said 'har and downwardly when receding therefrom and mandrel-holding means on the free end of said a.

2. machine for removing and replacing mandrels on the end of a mandrel bar4 between a. pair of, rolls including a guide, a K

cross-head slidahly carried `lo said arm havingv one end pivo on said crosshead, means for controlling the pivotal action of said arm so its free end' swings u adjacent the end of said har when advance theretowards and downwardl therefrom when moved in the opposite direction and mandrel-holding means on the free end of said arm.

ide, an l 3. A machine for removing and replacing mandrels on the' end of a mandrel bar between a pair of rolls including a guide adjacent the end of` said har, a cross-head associatedwith said guide, anl arm havingv one end ivotcd to said cross-head and'its other en extending towards said bar and curved u wardly, a surface betweenI said said-aarm, mamireL-ln'ildingineans on theafree extremity of said arm and means for vreciprocating sald cross-head.

4. A machine for removing and replacing mandrels on the end of a mandrel-bar between a pairof rolls including a guide adjacent the end of said bar and havin an upwardly flared top surface at its en remote therefrom, a cross-head associated with said guide, an arm having one end pivotally carried by said cross-head and constructed with a projection sliding beneath said top surface to hold the free end of the arm in an upward position, mandrel-holding means on the free end of said arm and means for reciprocating said cross-head.

5. A machine for removing and replacing mandrels on the end of a mandrel bar between a pair of rolls comprising a guide alined in front of and below said bar, a crossheadslidably carried by said guide, an arm having one end pivoted to said cross-head and its other end extending towards said bar and curved upwardly, a roller holding up the free end of said arm, a rockably mounted roller holding said arm down on said first named roller, mandrel-holding means on the free end of said arm and means for recipro eating4 said cross-head.

In testimony whereof, I have hereunto set` m hand.

y HARRY R. JUDSON. 

